Trolley.



PATENT Eb JULY a. 1906.

APPLICATION FILED HOV. "I, 1904. RENEWED JAN. 19, 1906.

v INVENTEI reason hereinaiger set out.

n'nrrrn STATES PATENT OFFICE.

OF SACO, MAINE.

Tao L L E Specification of Letters Bateiit.

hiatented July 3, 1906.

Application filed November 7, 1.904. Renewed January 19. 1906. SerialNo. 296.828.

To (Lid 711 mm it may concern:

Be it lniovthat I, Josnrn TETLow, a sub ject of the Kiz'zg' of GreatBritain, residing at Saco, ir. the county of York and State of Maine,have invented new and uselul Tm provemcnts in Trolleys, of which thefollowingis a speciiicati on.

My invention relates to improvements in trolleys, and more particularlyto the construction of the running contact and in the method of mountingit in the harp. Its objects, among others, are to make the trolley moredurable, to lessen the friction of the wearing parts, to enable thecontact to accommodate itself to changes in the direction and thealtitude of the track, and to render it possible to replace the centeror part of the contact most subject to Wear without at the same timerenewing the sides.

In thedrawings herewith accompanying and maln'ng a part of thisapplication, Figure 1 is a vertical transverse sectional view of myimproved trolley. vFig. 2 is a side view of the central member of therunning contact. Fig. 3 is an inside view of one of the side members ofthe running contact. Fig. 4 is a detail plan view showing one method ofsecuring the ends oi'the harp to the body thereof, and Fig. 5 is an endview of the core which supports the running contact.

Same characters refer to like parts in all the figures.

In said drawings, A represents the body of the harp, and B theterminals, removably secured thereto in any convenient manner as, forexample, by threaded bolt C passing through the body of the harp and anextension D of the terminals. It is important that the extremities ofthe harp should be firmly but removably secured to the body, for the Tothis end the extension of the terminals is provided with raised sides E,forming a groove or recess F, in which the endsof the body part lie,substantially as shown in Figs. 1 and 4. The headed bolt which securesthe terminals to the body of the harp is locked against rotationby meansof a flat spring G, secured to the body of the harp by a screw J, saidscrew passing through an elongated slot J in the spring. The oppositeend of the spring is provided with a rectangular opening I, adapted-togive entrance to the headed olt which secures the terminals to the bodyof I the harp. The terminals are provided on the inside with shanks Kand with antifriction ball-races L. They-are also centrally: bored toreceive the threaded end of a bolt M. nals are rotary disks N, having onthe outsides antifricti on mall-receiving races 0 "to Mounted upon theshanks of the termicooperate with the races in the terminals incontaining antifriction ball-bearings P. The

inner faces of said disks have recesses togive entrance to the ends S ofa core R, adapted to rotate with said disks, and as a COIIVGIL' ientmethod of removably securing the core to the disks, so as to enable themto be reads ily separated when desired, the recess Q'Z'Is] rectangular,and the ends of the core are may 91 tangular to fit the recess. r hecore has a rounded section T lntermedi ate its ends and also has on thesurface thereof one'or more thin projections or lugs U. The runningcontact is composed of a central wearing-sectron V with projections Wextending outwardly from the sides thereof and preferably has a curvedgroove X in the peripher thereof at the point of normal contact Wit thetrack. The side members Y have openings Y in the sides thereof to givntrance to the projections W on the cent section, whereby the sectionsare remova y inte'r locked when in the position shown'jin Fig. f- Theextremities .of the outersec'tions are" slightly flaring, as shown at71. The bores of the sew sections are curved, as seen at -1",-

the curvature bein substantially that of the rounded center of thecore,'whereby the running contact is free to assume a varying angle tothe core. The inner section s provided with recesses 2 to give entranceto the lugs U on the core, so as to hold the runn ng contact I fromrotation independent of the core, but at the same time leave the contactfree to assume a varying angle to the core. Interposed between the sidesoi the running contact and the disks before referred'to are coilsprings3, These coil-springs are for'convenience seated one end in a circularoove 4 in the side of the running contact an the other end in a similargroove 5 in theface of the disk, and they tend to hold'the parts of thecontact in yielding engagement.

It will be obvious that many of the parts maybe varied and still bewithin thespirit and scope of my invention. 7

To construct my improved trolley, the cen- 'io s screwed onto the endsof the belt which holds vi the tcrzninnis. The terminals are thensecured to the body of the harp.

Themlvztntugcs of my improved trolley arotintt the parts weer longer,run more easily, -(ind accommodate themselves more *icedi ly 'to'curvesand switches in the track. "lhelia-bilit v of the trolley to leave thetrack lessened by reason of the fact that the sidemeinhers'of therunning contact are free to move one relative to theother, beingyieldingly held by thesprings.

Having thus described my invention and itsnse, I cluim- 1 In :i trolley,in combination, a harp (mniprising a body part and ends icinovalhlsecured thereto, said removable ends heing provided with lied-hearingsin the adjacent sides, a runningcontzict comprising av plureh ity ofvertical sections, means for holding; the sections in yielding contactand means interinediate said contact and hearings for sup- Imi'ting saidrunning contact. I

2. In a trolley, in. combination, a harp having lm'll hcm'ings in theadjacent sides of its ends, it rulmingwontuct support compris- "ing diskswith antil'riction-hull-receiving races on the outside andcore-receiving rep The sides of the running I contact are then pieced inposition.

senses V cesses on the inside, a core having a roundedfriction-bell-receivmg races on the outside,

core-receiving recesses on the inside and coilspring-receiving recesseson theinside and a core having anenlarged rounded center and endsadapted to enter and lock in the corereceiving recesses in said disks, arunn ng contact comprisin. a plurality of sections mounted upon saidenlarged portions of the core, the bore of the sections substantiallycorresponding with the rounded center of the core, coil-springsinterposed between the sides of the running contact and said disks andmeans for lockiln the running contact against rotation on the core, saidrunning contact being free to move laterally upon said core.

In testimony whereof I have signed m name to this specification, inpresence of two subscribing witnesses, this 31st day of ()ctoher, 1904.I

JOSEPH TETLOW. In presence of ELGIN C. VENILL, MAnioN RICHARDS.

